JPS55154335A - Manufacture of optical fiber - Google Patents

Manufacture of optical fiber

Info

Publication number
JPS55154335A
JPS55154335A JP6150779A JP6150779A JPS55154335A JP S55154335 A JPS55154335 A JP S55154335A JP 6150779 A JP6150779 A JP 6150779A JP 6150779 A JP6150779 A JP 6150779A JP S55154335 A JPS55154335 A JP S55154335A
Authority
JP
Japan
Prior art keywords
jacket tube
rod
heated
optical fiber
stress
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6150779A
Other languages
Japanese (ja)
Other versions
JPS5719064B2 (en
Inventor
Noriyoshi Shibata
Masao Kawachi
Takao Edahiro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6150779A priority Critical patent/JPS55154335A/en
Publication of JPS55154335A publication Critical patent/JPS55154335A/en
Publication of JPS5719064B2 publication Critical patent/JPS5719064B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01248—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing by collapsing without drawing

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To manufacture a deformation-proof optical fiber having good dimensional accuracy by a procedure in which a raw material rod is inserted into a jacket tube and then the jacket tube is heated while applying a stress to the rod in the direction of the portion to be heated. CONSTITUTION:The raw material rod 1 is inserted concentrically into the jacket tube 2, and a ring heating element 3 to melt the jacket tube 2 is provided separately from and concentrically with the jacket tube 2. The jacket tube 2 is heated up to its softening and processing temperature (approx. 1,500-1,600 deg.C for quartz tube) by the ring heating element 3 while applying a stress (usually approx. 200g) to the rod 1 in the direction of the portion to be heated of the jacket tube 2, whereby an optical fiber raw material with good dimensional accuracy can be obtained while preventing the deforming move of the rod 1. Also, in case where the jacket tube 2 is evacuated by connecting a holder 5 to a vacuum pump 6, the deforming move of the rod 1 becomes noticeable usually but can be prevented by increasing a stress to apply to the rod 1 by the said method.
JP6150779A 1979-05-21 1979-05-21 Manufacture of optical fiber Granted JPS55154335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6150779A JPS55154335A (en) 1979-05-21 1979-05-21 Manufacture of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6150779A JPS55154335A (en) 1979-05-21 1979-05-21 Manufacture of optical fiber

Publications (2)

Publication Number Publication Date
JPS55154335A true JPS55154335A (en) 1980-12-01
JPS5719064B2 JPS5719064B2 (en) 1982-04-20

Family

ID=13173067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6150779A Granted JPS55154335A (en) 1979-05-21 1979-05-21 Manufacture of optical fiber

Country Status (1)

Country Link
JP (1) JPS55154335A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693462A1 (en) * 1994-07-21 1996-01-24 PIRELLI GENERAL plc Optical fibre preforms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693462A1 (en) * 1994-07-21 1996-01-24 PIRELLI GENERAL plc Optical fibre preforms

Also Published As

Publication number Publication date
JPS5719064B2 (en) 1982-04-20

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